Install ConformanceFrameworkTests in mts

sdkextensions_conformance_framework_tests is installed in mts, which runs
ConformanceFrameworkTests.jar. Since ConformanceFrameworkTests.jar is
not installed in mts, it causes errors in mts. Failing test
v2/android-test-harness-team/mts/mts_unit_tests.

Bug: 261855411
Test: atest sdkextensions_conformance_framework_tests in
tm-mainline-prod branch

Change-Id: I7e6cfb840f328728cce6be2bc64fcd398a5d6784

javatests/com/android/modules/conformanceframework/Android.bp

@@ -34,5 +34,6 @@ java_test_host {
     ],
     test_suites: [
         "general-tests",
+        "mts",
     ],
 }